Hoisting apparatus



(No Model.)

J. ROUGHAN HOISTING APPARATUS.

Patented Aug. 8, 1882.

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JAMES ROUGHAN, OF BOSTON, MASSACHUSETTS.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 262,322, dated August8, 1882.

Application filed July 6, 188:).

To all whom it may concern Be itknown that I, JAMES ROUGHAN, of Boston,in the State of Massachusetts, have invented an Improvement in HoistingAppara tus, of which the following is a specification.

I have made use of apparatus embodying my said improvement for thepurpose of discharging vessels laden with coal, and shall describe thesame as so used; but it will be obvious that the apparatus is equallyapplicable for hoisting coal or ores from mines and other similarpurposes.

In the most common apparatus for discharging vessels laden with coal thehoisting-rope to which the basket is attached passes over a pulley uponthe end of the jib of a crane. When the loaded basket has been drawn upperpendicularly to a proper height above the level of the platformuponwhich the operator stands thejib is swungaround until the basket is overthe car into which or the place upon which the load is to be dumped. inan apparatus which in some respectsis an improvement upon this commonhoisting apparatus the jib or corresponding projecting arm is stationarywhen in use rather than swinging, and is provided with an inclined trackand a pulley travelingthereon. Thehoisting-ropepassesoverthis pulley;but,instead of being attached directly to the basket, itis doubled uponan intervening block or pulley, and is attached to the pulley thattravels on the inclined track. In the'operation of this apparatus, asthe hoisting-rope is wound up by the engine the lower pulley is firstpulled up to the upper pulley, and then the two pulleys travel togetherup theinclined track, taking with them the loaded basket, and similarly,when the rope is slackened that the basket may be returned to the holdof the vessel, the two pulleys first slide together down the inclinedtrack, and then the lower pulley, with the basket, drops into the hold,doubling the rope between the two pulleys as it falls. Thislast-mentioned apparatus is faulty in requiring the basket, to becarried up to an inconvenient height before the load can be dumped, andalso in being too slow, sinceit requires a double length of rope for theperpendicular movement of the basket in either direction.

By my invention Ihave avoided these faults;

(No model.)

conveyed horizontally to the dumping place by a continuous pull ofthehoisting-engineupon a rope, which, passing over a pulley at the end ofthejib, is secured directly to the. handle of the basket, and is asingle rope throughout. Means are provided for giving the said pulley asubstantially horizontal movementalong the jib, and a hanging weight issoattached to the pulley-frame by a second rope as to tend to draw it tothe outer end of the jib. The weight approximates somewhat closely thatof the basket when loaded, and the arrangement. is such that a pull uponthe hoisting-rope first draws the loadedv basket up to the blockorpulley at the end of thejib, and then, continuing, acts upon theweight, and whilelil'ting the latthe draws the block or pulley inward,and with ittheloadedbasket. emptied the weight is very much heavier thanthe basket, and when the strain of the engine upon the hoisting-rope hasbeen released the weight first draws the block and basket together tothe end of thejib, and then the hasket falls perpendieularlyinto thevessels hold.

In thedrawing hereto annexed the figure represents an apparatusembodying my said invention.

A is the post or mast, and B the projecting arm or jib of a crane,thejib being secured to the mast bya universal joint, a, and a chain, 0.After thejib is swung to its proper position over the hatchway of thevessel it is steadied in that position by guys. (Not shown.)

0 is the operators platform, hinged to the mast or to a frame-work aboutthe mast, and partly held up by chains 0, as shown. 0 is a permanentplatform. The car to receive the load runs upon these two platforms.

E is a cross-beam bolted to the end of the jib, as shown, and furnishingbearings for two directing-pulleys, (1 6?. Along the top of the jib is arod or rail, r, on which runs a grooved wheel, I, the said wheelbeingconfiuedto said rod and to the jib by a loop, Z, forming an axisfor the wheel and embracing the jib, as shown. To this loop 1,011 theunder side of the jib,is se- After the basket has been cured thehoisting pulley or block P, over or through which passes thehoisting-rope 6, one end of which, after passing overa suitabledirecting-pulley, (Z is secured to the drum operated by the engine,while the other is secured to the basket G. To the loop I is alsosecured one end of a second rope, 6 the other end of which, afterpassing around the before-mentioned directing-pulleys d and d and otherdirecting-pulleys, d and d ,is attached to aheavy weight, \V, whichnormally rests upon the pier at the foot of the mast. A bolt, t,inserted in one of SGYtlfll holes at the end of thejib, limits theoutward movement of the wheel F, and consequently of the block 1?, alongthe jib.

H is a framework straddling the jib, and secured in any requiredposition by a bolt, 20, as shown. This frame-work carries a projectingplank, m, of suflicient width to be readily struck by the latch p oftheloaded basket when the latter is directed against it by the operator.

The mode of operation needs no further explanation, and it is obviousthat it would be within my invention to secure the block P to aproperly-shapedjib by a simple loop, omitting the grooved wheel F andthe rod 1', and even if the loop were omitted and the rope 0 were madefast to the block P, the weight W, being sufficient and thedirooting-pulleys being in the positions shown, a pull of the engineupon the hoisting-rope would first draw the loaded basket up to theblock I? and then draw the said block with the basket in a horizontaldirection, and under similar conditions, when the pull of the engineshould cease, the weight W would first draw the block and baskethorizontally to the direeting-pulleyd, when the basket would fallperpendicularly, as in the present construction.

I claim- 1. The combination, with the basket, hoistingrope,hoisting-block, and jib in a hoisting apparatus, of a weight tending todraw the said hoisting-block to the outer end of the said jib,substantially as described.

2. The combination of the basket Gr, weight V, block P,jib B, rail 1,grooved wheel F, loop 1, ropes c and 0 and suitable directing-pulleys,substantially as described.

3. The combination of the basket G, provided with the latch athe weightW, block P, jib B, loop I, ropes 0 and 0 suitable directing-pullcys, andframe-work H, provided with projection m, substantially as described.

JAMES ROUGHAN.

Witnesses:

Joseru G. AHEARN, W. W. SWAN.

